Shock-absorbing attachment.



J. CARSON. SHOCK ABSORBING ATTACHMENT.

APPLICATION FILED FEB.21, 1913.

Patented Aug". 12, 1913.

entrain srarns Parana? orrron. I

JOHN season, or cnnrnnron'r, new YORK.

SHOCK-ABSORBING ATTACHMENT.

orain.

Specification of Letters Patent.

Application filed February 21, 1913. Serial No. 750,031.

shock absorbing attachments for vehicle.

springs, and it proposes a device which may i be app-lied with facility to. an elliptic spring 0i ordinary construction.

The principal object of the invention is 1 to. provide a device for substantially eliminating the minor shocks or vibrations scribed which shall be compactly organized,

which occur on the recoil and counter-recoil oi the spring. The ordinary elliptic spring is proportioned to withstand heavy shocks and 01;- this reason there-is, of necessity, a certain sacrifice of resiliency, with the result that in the action of the spring certain minor tremors are set up which detrimentally affect the engine and the driving gear. The device which forms the subject of the present invention is intended to reduce these minor tremors and to thereby improve the riding qualities of the vehicle.

Further objects of the invention are to provide an attachment of the character deofself-contained nature, inconspicuous, and

readily applicable to existing types of vehicle springs.

An embodiment of the invention is illus accompanying drawings,

views. The vehicle spring shown is of the ord1-.

nary elliptic form, comprising the lower 2 7 section A associated with the axle B, and

the ve- The attachment which forms the subject" Patented Arn 12,1 913. i

of the present invention and is designated generally by the letter E comprises relatively movable parts which are associated with the respective spring sections, and means for putting a drag on the movei'nents of these parts relatively to one another;

Thus, the embodiment shown comprises a casing,- 1 which is associated with the axle B, and a block 2 which is associated with the spring section C, (or it mightbe the vehicle frame 1)), being connected thereto by a rod.

3. The block 2 reciprocates in the casing l consequent to the tremors or vibrations of the spring sections and for the purpose of putting a drag on'said block in its reciprocatory actiomspring pressed shoes 4 are provided, the arrangement being such that the pressure with which the shoes 4 bear on the block 2 increases pro] )ortionately to the extent ()flllOVOlllOlli) of said block.

The shoes & are arrangedin pairs at opis arranged between said shoes, has at its sides rcversely inclined -faces G which bear against the shoes 4., the arrangeuu-nt being such that the upper inclined faces (3 coact with the upper shoes 4- and the lower inclined faces (3 coact with thelowcr shoes 4.

For the purpose of establishing'a relatively strong frictional engagement between the shoes 4 and the block 2, each shoe is acted on by a spring 7. In the embodiment shown, l-hcsc springs are of the expansive coil type and are arranged near the upper and lower heads 8 of the casing 1, being'centercd within retaining cylinders l) which are carried by the walls of said casing, adjoining said shoes. The outer ends of the cylinders 9 are closed by threaded caps 10 which may be utilized 0 regulate the ten sion of the springs 7.

The walls of the casing, ladjoining the ,shoes 4 may be provided at..tl'ie;ir sides with on said block.

overlie the block 2, and in the event of any looseness of the parts, serve to accurately center said block with relation to said shoes. The block 2 normally occupies the position shown in Fig. 2, wherein it is located symmetrically with relation to the upper and lower shoes 4 and its faces 6 are in engagement with the corresponding shoes. When the spring sections are vibrant and the block 2 reciprocates in the casing 1, the shoes 4 will be moved against the tension of their springs 7. A movement of the block 2 from the position of Fig. 2 toward the upper end of the casing 1 causes an outward movement oi the upper shoes 4, accompanied by a progressive increase of the ressure of said shoes A simi ar action is e-fiected in the case of the lower shoes. 4 when the block 2 moves from the position of Fig. 2 to the lower end of the casing 1. Of course, when the block 2 moves toward the center of the casing 1, the springs 7 move the shoes 4 inwardly. In this way the shoes 4 exert a constant drag on the block 2 in its reciprocatory movements, and it follows that the minor vibrations of the spring sections A I and C are substantially reduced.

For the purpose of supporting the casing 1, it is preferred to use a bracket 13 which is secured to the lower head of said casing and has formed therewith a hook 14 for engagement about the axle. The hook 14 firmly supports the casing 1 and its associated parts from the axle and yet allows of such slight pivotal displacements of said casing as may be attendant upon the action of the spring sections A and C.

Having fully described my invention, I

ing a casing, a block movable therein, shoes mounted in pairs at opposite sides of the block for frictional engagementtherewith, the'shoes of each pair being mounted upon a common pivot, springs bearin against the shoes adjacent their outer on 5, spring res taining cylinders set into the walls of the casing, and removable caps forming closures for the outer ends of the cylinders and against which the springs bear.

In testimony'whereof I have hereunto set my hand in presence of two subscribing witnesses.

' JOHN CARSON.

Witnesses:

' Jesse B. PULLEN, J12, THERON H. SAMMIS. 

